我想使用Hibernate @Forumla注释来计算字段值:
balance = intialBalance +(sum(借记类型的交易) - (总和(CREDIT类型的交易))
我有桌面交易:
CREATE TABLE transaction
(
idtransaction serial NOT NULL,
directionoftransaction character varying NOT NULL,
amount numeric,
observation text,
datetransaction timestamp without time zone,
idtypeoftransaction bigint,
idaccount bigint,
iduser bigint,
CONSTRAINT prk_constraint_transaction PRIMARY KEY (idtransaction),
CONSTRAINT fk_transaction_idaccount FOREIGN KEY (idaccount)
REFERENCES account (idaccount) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION,
CONSTRAINT fk_transaction_idtypeoftransaction FOREIGN KEY (idtypeoftransaction)
REFERENCES typeoftransaction (idtypeoftransaction) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION,
CONSTRAINT fk_transaction_iduser FOREIGN KEY (iduser)
REFERENCES tuser (iduser) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION,
CONSTRAINT transaction_observation_key UNIQUE (observation)
)
她是帐户实体
@Entity
@Table(name = "account")
public class Account {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "account_seq_gen")
@SequenceGenerator(name = "account_seq_gen", sequenceName = "account_idaccount_seq", initialValue = 1, allocationSize = 1)
@Column(name = "idaccount", unique = true, nullable = false)
private Long idAccount;
@Column(name = "namebank")
private String nameBank;
@Column(name = "accountnumber")
private String accountNumber;
@Column(name = "initialBalance")
private BigDecimal intialBalance;
@Formula("intialBalance + (select amount from Transaction t where directionoftransaction = 'CREDIT') minus (select amount from Transaction t where directionoftransaction = 'DEBIT')")
private BigDecimal balance;
}
这给出了语法错误,那么我如何构造查询呢?
答案 0 :(得分:0)
在更正查询语法后,我找到了解决方案。
@Entity
@Table(name = "account")
public class Account {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "account_seq_gen")
@SequenceGenerator(name = "account_seq_gen", sequenceName = "account_idaccount_seq", initialValue = 1, allocationSize = 1)
@Column(name = "idaccount", unique = true, nullable = false)
private Long idAccount;
@Column(name = "namebank")
private String nameBank;
@Column(name = "accountnumber")
private String accountNumber;
@Column(name = "initialBalance")
private BigDecimal intialBalance;
@Formula("COALESCE(initialSolde,0) + ((select COALESCE(sum(t.amount),0) from transaction t where t.idaccount = idAccount and t.directionoftransaction = 'CREDIT') - " +
"(select COALESCE(sum(d.amount),0) from transaction d where d.idaccount = idAccount and d.directionoftransaction = 'DEBIT'))")
private BigDecimal balance;
}